Adhesive applying apparatus for cigarette making machines



ug. 12, 1952 w. E. WRAY ADHESIVE APPLYING APPARATUS FOR CIGARETTE MAKINGMACHINES 2 SHEETSSHEET 1 Filed March 10, 1950 FIG. 2

RAY 2,606,521 APPARATUS FOR NG MACHINES W ADHESIVE APPLY CIGARETTE MAug, H2, 1952 ING .AKI

2 SHEETSSHEET 2 Filed March l0, 1950 'is delivered to the feed screw. 7are presentin paste delivered to the nozzle, the

Patented Aug. 12, 1952 ADHESIVE APPLYINGAPPARAITUS .i CIGARETTEMAKINGEMALCHINES William E Wray}. R'idsville, N'.,C., a's'signortolTheAmerican" Tobacco Company", "New-York, N. Y., acorporation (if-NewJersey ApplicationMarch 10, 1950;: Serial Noni 8,991

" 2 'Glaims. 1 This-invention. relates to machines. for applying astripoftpasteato a moving sheetorweband .more particularly td-apparatus for.applying paste topaper in a cigarette making. machine.

As is well known, cigarettes .arernade. by .continuously feedingthepaperfrom aroll .at..-a predetermined speed, feeding the proper. quantity oftobacco to the papertoproduce cigarettesjof a given weight,andthencompleting the manufacture of vthe cigarettesin a continuous.rod....A

.suitable .cuttersevers. cigarettes of the .proper length from this rod.

Various improvements in cigarette. .making machines have resulted invincreasedspeed .of production and the. apparatus. heretoforeflused forsupplying. paste have proved. linadequatelin highspeed machines. In thepresent invention I provide a paster. which is capable of. operating athigh speed withouttheattendantdisadvantages of the pastersheretoforeused.

The device consistsof apaste potarranged-on i and communicating. with ahousinghiniwhi'cha revolving feed screw is mounted... At its forwardend, the feedscrew is-provided with a..radi'al port communicating with acentral port orpassage. The opposite-end of this port communicates withan axial passage. A nozzle is mounted on the end of the feed screwand'rotates therewith. The nozzle is provided Withan axialpassagecommunicatingwitn'the axial passage in the feed screw.

The inventionalso comprises means for eliminating air bubbles from thepaste as the .paste If air. bubbles portion of the paper passing. thenozzle at. the time theair bubble is released,.receives no paste and asa result the cigarette is notproperly sealed. Removal of theair-bubbles, together with the other structural features of theinvention, results in a continuous feed of paste to the edge of thecigarette paper.

In the accompanying drawings I have shown one embodiment of theinvention. In this show- Fig. 1 is a plan view of the paste pot mountedon the bed of a cigarette machine;

Fig. 2 is a vertical, sectional view on the irregular line 2-2 showingthe support for the paste pot;

Fig. 3 is a central, longitudinal, vertical, sectional view on line 3-3of Fig. 1;

Fig. 4 is a detailed, horizontal, sectional view on line 44 of Fig. 3;and

Fig. 5 is a detailed, vertical, sectional view on line 5-5 of Fig. 4.

" Referring to. the drawings,- the. reference =nu- .meral l designatesthe bodyofthefeeder-Qand it is provided with acentral bore. 2.

The bushing 3 is mountedin" the. central bore. :The feed. screw 4 ismounted in the bushing and throughout. the

. greater portion =of .the ilength ofsthe... bushing, .forms acomparativelytight fittherewith. ...'l2he iced screw. is providedwiththreads 5 extending substantially throughout. the lengthofl the.bushing, the threadsr being..deeperat .the .-reareend and taperingtoward.v the. front. or..o,utlet .end.

.In aspecificembodiment of.-.the ,inv.ention,'.Ithe .threads. are;-.deepat the outlet end. andtaper one-halfsdegree. toward the v.oppositev.end. .,At each end ofmthe. bushing, the. reed screweis. reduced indiameter, asindicated at; 6,..andipasses through a closure 1..whichpreventsi'. leakage of paste. betweenthe bushing and the.zteediscrew .at. the opposite. ends. .The .feed screw .is..-adapt.ed to.rotate and is mounted! in suitable b'a1l b. ear- .ings. 8.. .A. housing9. surrounds .the.,.ball.vbearings and .the closure. [at ,.the. rear.endlof the feedscrew and a' similar housing IE1.isiarrangedatltheflfront end.

LI .The'itop .-.of' the casting orl.-body is provided with. a circular;.flange l l .to which a..paste= .D'ot 12 may. be. secured in..any,.suitable .mannenas .bvm'ating threads IS; {The paste pot-islprovidedwith acover MJTIThe bottomlofilthe pastehpot is providedwith.an...op,ening115.;and bushing" 3' is provided with... an l'alignedopening l 6 .wheifeby the. paste .isdelivered toxthe feed screw adjacent.the rearend. .Adjacent theforward end offthe feed screw I provide acircularjgroovel I andZIJthis groove. communicates with a radial,port'fl 8."""I he .r'adial port. extends to: thecenten'and communi- 1in the endfof the bore,"'l9 'inany'suitablemanner as by"adjusting nut22.

The rear end of the feed screw is provided with a bevel gear 23 and iscovered by a guard cover 24 secured to housing 9.

When the paste pot is in operative position, gear 23 meshes with apinion 25. This pinion is mounted on a shaft 26 which passes through thebed 21 of the cigarette making machine. The lower end of shaft 26carries a gear 28 which is driven from one of the moving shafts (notshown) of the cigarette making machine. A flanged sleeve 29 extendsthrough the bed of the machine and forms a bearing housing for the shaft26. Bearings 36 are arranged within this sleeve. The flange 3| issecured to the bed of the cigarette machine by bolts or studs 32. A

guard 33 for bevel gear 25 is secured to the flange. As shown (see Fig.3) the guard extends substantially half way round the top of the gearand cooperates with the cover 24 to form a complete housing when theparts are in the operative position shown in Fig. 3 of the drawings.

Fig. 1 of the drawings shows the paster in uperative position in fulllines, and in inoperative position in dotted lines. As shown in Figs. 1and 2, the base I of the machine is provided with an arm 34 terminatingin a sleeve 35. This sleeve is received on a post 36, the post beingmounted on a plate 31 which is received in a recess in the bed 21 of thecigarette making machine. The plate 31 and post 36 are retained inposition by bolts or ing 4| in the top. The post is in turn providedwith a threaded bore 42 in alignment with the threaded opening 41. Theseopenings are provided with threads of different pitch and a differentialscrew 43 passes through the opening 4| in the sleeve and is received inthe bore 32. It will be apparent that when the screw 43 is turned, thedifference in the pitch of the threads on the two portions thereof willcause the sleeve 39, and therefore the paste pot, to be raised orlowered, as indicated in dotted lines, thus permitting verticaladjustment of the nozzle.

Sleeve 35 is split as shown at 44 in Fig. 1 of the drawings. A clampingscrew 5 is passed through aligned openings in the two ears 45, one ofwhich is threaded to receive the screw 45, and the clamping screw isprovided with an operating handle 41. By turning the handle 41 torelease the clamping screw, the paste pot may be swung away from thepath of the cigarette rod as indicated in dotted lines in Fig. 1 of thedrawings. This permits easier access to the paste pot for any repairs oradjustments. When the paste pot is swung into its operative position,the cover 24 cooperates with guard 33 to cover the pinion 25.

As stated, throughout most of the length of the bushing 3 and the feedscrew 4, the feed screw forms a comparatively close fit in the bushing.As a result, the paste in the threads 5 is milled as it passes along thefeed screw and is thus delivered to the bore 19 of an even consistency.In alignment with the openings I5 and 16 in the bottom of the paste potand the bushing, the bore of the bushing is eccentric, as indicated at48 in Fig. 5 of the drawings. As shown, the wall of the bushing at thisportion tapers in thickness from the opening [6 to the bottom asindicated at 49. This provides a passage or chamber 58 surrounding thefeed screw which is wider at the top and tapers to the depth of thethread 5 at the bottom. In actual use of the paster I have found thatthis eliminates air bubbles which get into the paste in the paste potdue to slight agitation caused by feed of the paste from the bottom ofthe paste pot.

I claim:

1. A paster for cigarette making machines comprising a body having acylindrical bore, a bushing mounted in the bore, a threaded feed screwmounted in the bushing, the feed screw being snugly received within thebushing throughout most of its length, the bushing being provided withan eccentric portion adjacent its rear end providing a chambersurrounding the feed screw tapering in width, the chamber being ofgreatest width at its top and being open at the top to receive paste,the feed screw being provided with a radial port adjacent its forwardend and an axial bore communicating with the radial port, a nozzlemounted in the bore and rotatable with the feed screw, and means forrotating the feed screw and the nozzle to deposit paste on the paperpassing the end of the nozzle.

2. A paster for cigarette making machines comprising a body having abore, the bore being cylindrical throughout most of its length and beingprovided with an eccentric portion adjacent its rear end, a threadedfeed screw mounted in the bore, the feed screw being snugly receivedthroughout the cylindrical portion of the bore, the eccentric portion ofthe bore forming a chamber surrounding the feed screw tapering in width,the chamber being of greatest width at its top and being open at the topto receive paste, the feed screw being provided with a radial portadjacent its forward end, and an axial bore communicating with theradial port, a nozzle mounted in the bore and rotatable with the feedscrew, and means for rotating the feed screw and the nozzle.

WILLIAM E. WRAY.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PA'IENTS Number Name Date 532,645 Cushing et a1 Jan. 15,1895 1,390,930 Scott Sept. 13, 1921 2,111,865 MacKenzie Mar. 22, 19382,130,689 Leary Sept. 20, 1938 2,286,405 Gordon June 24, 1942 2,343,529Brown Mar. '7, 1944 2,407,503 Magerkurth et a1. Sept. 10, 1946

